<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head lang="en">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <style>
        *{margin: 0px;padding: 0px;}
        .a-upload {
            float: left;
            padding: 4px 10px;
            height: 20px;
            line-height: 20px;
            position: relative;
            cursor: pointer;
            color: white;
            background: #00b7ee;
            border: 1px solid #ddd;
            border-radius: 4px;
            overflow: hidden;
            display: inline-block;
            *display: inline;
            margin: 10px;
            *zoom: 1;
            text-decoration: none;
        }
        .a-upload  input {
            position: absolute;
            font-size: 100px;
            right: 0;
            top: 0;
            opacity: 0;
            filter: alpha(opacity=0);
            cursor: pointer
        }
        .a-upload:hover {
            color: white;
            background: #00b7ee;
            border-color: #ccc;
            text-decoration: none
        }
    </style>
</head>
<body>
<div style="margin :0px auto; width:990px;float: left;">
    <a href="javascript:;" class="a-upload">
        <input type="file" name="file" id="doc" multiple="multiple" onchange="javascript:setImagePreviews();" accept="image/*" />点击这里上传文件
    </a>
    <div id="dd" style=" width:990px;float: left;"></div>
</div>

</body>
<script type="text/javascript">
    //下面用于多图片上传预览功能
    function setImagePreviews(avalue) {
        var docObj = document.getElementById("doc");
        var dd = document.getElementById("dd");
        dd.innerHTML = "";
        var fileList = docObj.files;
        for (var i = 0; i < fileList.length; i++) {
            dd.innerHTML += "<div style='float: left;margin-top: 10px;' > <img id='img" + i + "'  /> </div>";
            var imgObjPreview = document.getElementById("img"+i);
            if (docObj.files && docObj.files[i]) {
                //火狐下，直接设img属性
                // imgObjPreview.style.display = 'block';
                imgObjPreview.style.width = '160px';
                imgObjPreview.style.height = '130px';
                imgObjPreview.style.margin = '5px';
                imgObjPreview.style.borderRadius = '5px';
                //imgObjPreview.src = docObj.files[0].getAsDataURL();
                //火狐7以上版本不能用上面的getAsDataURL()方式获取，需要一下方式
                imgObjPreview.src = window.URL.createObjectURL(docObj.files[i]);
            }
            else {
                //IE下，使用滤镜
                docObj.select();
                var imgSrc = document.selection.createRange().text;
                var localImagId = document.getElementById("img" + i);
                //必须设置初始大小
                localImagId.style.width = "160px";
                localImagId.style.height = "130px";
                imgObjPreview.style.margin = '5px';
                imgObjPreview.style.borderRadius = '5px';
                //图片异常的捕捉，防止用户修改后缀来伪造图片
                try {
                    localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
                    localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;
                }
                catch (e) {
                    alert("您上传的图片格式不正确，请重新选择!");
                    return false;
                }
                imgObjPreview.style.display = 'none';
                document.selection.empty();
            }
        }
        return true;

    }
</script>

</html>